I have heart problems with tremors and shaking?

i am a 34 year old male,185cm-84kg and very thin, i was treated for graves disease 4 years ago with total RAI ablation.treated with eutroxsig my thyroid levels are perfect,testing 3 days ago revealed clear lung xraymy cholesterol level was 7.2….For the past 12 months iv had regular very uncomfortable pinpoint tickling sensations in my heart area, that are always accompanied by extreme tremor/shaking in entire body and complete loss of breath but not ability to breath,it happens more when im at rest and mainly seated,it is consuming my life with the tremors being almost constant.my doctor doesnt take it seriously because of my weight and age,and my endocrinologist told me to start drinking alcohol for tremors but offered no help or answers…any advice to help with heart/tremors that might have been overlooked would be great thankyou